Download Pg. 118 RTW: Which animal phylum do you think has the most

Monday, April 17th
NO RTW
• Objective:
• I will be able to review and prepare for the marine science
final.
• Agenda:
• Marine Science Final Review Packet
• Homework:
• None 
Tuesday, April 18th
Pg. 118 RTW: Which animal phylum do
you think has the most species?
• Objective:
• I will be able to cite examples and explain the adaptations
to the marine environment of the invertebrate phyla:
Arthropoda.
• Agenda:
• Arthropoda Foldable
• Arthropoda group be ready to present tomorrow!
• Homework:
• None 
Arthropod Foldable
 Examples: insects, spiders, crabs, barnacles, copepods,
shrimp and lobsters.
 Class Crustacea : mostly marine arthropods
○ Cirripedia- barnacles
○ Copepoda- Copepods
○ Malacostraca- shrimp, lobster, crab
 General Characteristics:
 Gill breathing
 Specialized appendages for feeding, walking, defense…
(jointed appendages)
 Larvae is planktonic
 Grow via molting
 Bilaterally Symmetric
 Exoskeleton made of chitin hardened by CaCO3
Arthropod Foldable
 Diagrams:
 Reproduction: Sexual
 Some will carry eggs attached to abdomen until they hatch.
Phylum Arthropoda
Class
Crustacea
Largest phylum of animals w/ approx
One million known species
Includes: insects, spiders, crabs
Barnacles, shrimp, & lobsters
General characteristics
• Bilaterally symmetric
• Have jointed appendages (legs & mouth
parts)
• Exoskeleton made of chitin and hardened
by CaCO3
• Grow by molting
•Molting:
•Old exoskeleton is shed leaving
the animal soft
•The animal brings in water to
expand itself
•A new exoskeleton is secreted by
specialized tissue
•Exoskeleton
provides
protection,
support, &
flexibility
•Also imposes
limitations to
grow & size
Class: Crustacea
• 30,000 species primarily marine
• Gill-breathing
• 16-20 segments
• Open circulatory system
• Specialized appendages for food gathering, walking,
fighting, defense, etc.
• Start out life as a planktonic larvae
• Ex: lobsters, crayfish, shrimp, crabs, copepods,
barnacles, etc.
• Giant King Crab = largest crustacean (~12ft)
• Heaviest is the lobsters (up to 48 lbs!!)
•Have two pairs of antennae (one pair
smaller than the other)
•Small, planktonic crustaceans
include copepods,
•barnacles, isopods, krill
Barnacles
• Chitin exoskeleton & secretes CaCO3 shell.
• Feathery feet for filter feeding plankton
• Some attach to docks or boats and a few on whales
• Must close up with an operculum during low tide to avoid desiccation
(drying up).
•Other larger crustaceans include
shrimp, lobsters & crabs
•Considered decapods (5 pairs of
legs)
•Body consists of cephalothorax
(fused head & thorax) &
abdomen
• Crabs have a
compact abdomen
& a broad
cephalothorax
• Abdomen usually
tucked under
Male
Female
Abdomen with eggs
Videos
• Horseshoe Crab
• Molting Horseshoe Crab
• Mantis Shrimp
Lobsters
 http://www.youtube.com/watch?feature=endscreen&v=d5uQ317Osxw&NR=1&safety_mode=tr
ue&persist_safety_mode=1&safe=active
 Slipper lobster
 http://www.youtube.com/watch?v=8gBtsboSkOU&safety_mode=true&persist_safety_mode=1
&safe=active
 Spiny Lobster
 http://www.youtube.com/watch?v=o2QDJwOIa7s&safety_mode=true&persist_safety_mode=1
&safe=active
 Lobster Life Cycle: Safari Montage
Giant Spider Crab
King and Coconut Crabs
Wednesday, April 19th
No RTW: Arthropoda group be ready
to present when the bell rings!
• Objective:
• I will be able to cite examples and explain the adaptations
to the marine environment of the invertebrate phyla:
Arthropoda.
• Agenda:
• Arthropoda Fish Food Presentation
• Mollusca group be ready to present Friday!
• Homework:
• None 
Thursday, April 20th
Pg. 118 RTW: What is one interesting
fact about Arthropoda?
• Objective:
• I will be able to cite examples and explain the adaptations
to the marine environment of the invertebrate phyla:
Mollusca.
• Agenda:
• Mollusca Foldable
• Mollusca group be ready to present tomorrow!
• Homework:
• None 
Mollusca Foldable
 Examples:
 Class Gastropoda- Snails
 Class Bivalvia- Clams
 Class Cephalopoda- Octopuses, Squids
 General Characteristics:




Most numerous marine group, very diverse.
Soft body covered in CaCO3 (bivalves & gastropods)
One way digestion
Some herbivores and some carnivores
Mollusca Foldable
 Diagrams: (please label the class under your diagram)
Reproduction: External fertilization- bivalves, chitons, & some snails
 Sperm & eggs are released into water
 Internal fertilization-cephalopods & most snails
 Cephalopods have modified arm (Hectocotylus) to transfer sperm
to female
Phylum
Mollusca
• Includes these classes:
• Snails-class Gastropoda
• Clams-class Bivalvia
• Octopuses, Squids-class Cephalopoda
• There are more species of mollusks in the ocean than
any other group
• Soft body protected by a shell of calcium carbonate
• Very diverse in body structures and habits
Mollusk Diversity
Biology
• Much more complex than Cnidarians or Sponges
• Has a separate mouth and anus (1 way)
• Has salivary and digestive glands
• herbivores & carnivores (predators & filter feeders)
• circulatory system transports nutrients and oxygen
• Heart pumps blood to all tissues
• Most have open circulatory system (leaky),
cephalopods a closed circulatory system
• Nervous system simple to complex
• Most have separate sexes
• Some species are hermaphrodites
• External fertilization- bivalves, chitons, & some snails
• Sperm & eggs are released into water
• Internal fertilization-cephalopods & most snails
• Cephalopods have modified arm to transfer sperm to
female
class Gastropoda
• Snails-”stomach foot”
• Largest group
• Approx 90,000 species
• Mostly marine
• Body is coiled up inside shell
• Shell sits on a ventral foot
Nudibranch
(sea slugno shell)
Tulip snail
(with shell)
Body Structure
Mantle
• thin layer of tissue that produces the shell
Foot
Head
• muscular, used in locomotion
• some are well developed & have eyes
• area with small teeth used in scraping algae
or other food from surfaces, made of chitin
Radula
• hard plate used to close opening once
head/foot retracts into shell
Operculum
• Gas exchange is through gills
class Bivalvia
• Oysters (cement themselves to
hard surface)
• Clams (burrow)
• Mussels (attach to rocks using
byssal threads),
• Body compressed between two
shells
• Very large source of food for
humans and other marine
animals.
class Cephalopoda-2 in to 30 ft
• Cephalopods-most complex brain of all invertebrates
• considered intelligent and capable of
learning
• Most cephalopods display color changes correlated to
certain behaviors
• Hectocotylus-Specialized arm transfers a
spermatophore (packet of sperm)
• After eggs hatch female usually dies
Blue-ringed
Octopus
(Hapalochlaena)
giant pacific
octopus - Octopus
dofleini
Giant Squid
• Cephalopoda Camouflage
• Octopus vs Crab
• Cone Snail
Friday, April 21st
No RTW: Mollusca group be ready to
present when the bell rings!
• Objective:
• I will be able to cite examples and explain the adaptations
to the marine environment of the invertebrate phyla:
Mollusca.
• Agenda:
• Mollusa Fish Food Presentation
• Homework:
• None :)